Reij, Chris2016-04-192016-04-191991IIED Gatekeeper Series No. SA27978-1-84369-333-8http://hdl.handle.net/10919/66748Metadata only recordMany parts of Africa are experiencing annual population growth rates between 2 and 4%, degradation of the natural resource base, recurrent droughts and a growing dependence on food aid as well as the import of cereals to cover food deficits. During the last two decades increasing financial outlays for agricultural research in Africa have neither produced significant breakthroughs nor led to agricultural growth (Lipton, 1988).text/plainen-USIn CopyrightSoil degradationSoil conservationWater conservationAfricaField ScaleAbstractCopyright 1991 IIED